A direct TESS Sector 91 search misses most translated K2 dip models for HD 139139
HD 139139 showed 28 isolated dips in the 2017 K2 data. We test whether a direct aperture search of the public 2025 TESS Sector 91 data can find models with the published depths and durations. The primary search uses 8,315 exposures with QUALITY = 0, eight durations from 0.7 to 8.2 hours, a local quadratic baseline, and a fixed score threshold of 6. No primary dip reaches the threshold. At the original depths, the search recovers 111 of 14,336 isolated trapezoid injections, or 0.77%. Only 1.28% recover among trials that pass the coverage test. We also inject all events from 512 translated sections of the finite K2 sequence. Of these trials, 469 give no recovery at the original depths. Only 2 give no recovery at four times those depths. The TESS null result is therefore expected under this specified original-depth model. It does not establish that the original dips stopped. Secondary peaks depend on aperture and flux correction and do not support a new planet claim. The test assumes equal numerical aperture depths in the two instruments and fixed empirical noise scales. It does not measure upstream calibration losses or the sensitivity of other photometry methods. The package preserves the public FITS inputs, source records, event table, code, complete results, and figures for offline reproduction.
HD 139139 · EPIC 249706694 · TIC 70652803 · TESS Sector 91 · isolated dips · injection and recovery · selection function · public data · Random Transiter
References
7- usesdoi:10.1093/mnras/stz1772
Table 1 supplies the 28 K2 event times, depths, durations, and reported errors.
- doi:10.1051/0004-6361/202347779
Prior CHEOPS observations found no similar dips. Their sequence test motivates a separate sensitivity calculation.
- usesdoi:10.17909/rer5-r112
The primary input is a TESScut from these calibrated TESS Sector 91 full-frame images.
- usesdoi:10.17909/t9-r086-e880
The Sector 91 QLP product supplies secondary flux-series checks.
- doi:10.48550/arXiv.2011.06459
This paper describes the base QLP photometry method.
- usesdoi:10.17909/T9BC75
The K2SFF file supplies the first and last finite observation times for the translated sequence model. Its flux is not analyzed.
- doi:10.1086/678764
This paper describes the K2SFF product used for source time bounds.
Cited by
4 publicationsPublic catalog entries on Sciscape.
- usesA quadratic time and pointing fit gives positive raw count coefficients for 26 selected HD 139139 K2 dips
We reuse its unchanged CSV of the published K2 event facts through the cited pixel study. We do not reuse its TESS measurements or analysis code.
- supersedesA direct TESS Sector 91 search misses most translated K2 dip models for HD 139139
This edition corrects local dates that were labeled UTC in three provenance records. The input bytes, code, figures, and scientific results are identical.
- usesA quadratic time and pointing fit to 26 HD 139139 K2 dips keeps at least 48 percent of its signal after each aperture pixel removal
We reuse only the unchanged k2_events.csv table of published K2 event facts. We cite its TESS sensitivity result as prior work. We do not reuse its code or TESS measurements.
- No dips of at least 5% pass covered 6–18 hour triangle tests of RIK-210 in TESS sector 91
This study measures injection recovery for a different star in sector 91. It gives context for the limits of an empty dip search. We read it after our primary search was complete.